近断层地震对基础隔震结构动力响应  

Dynamic response of base isolated structure with near fault earthquake

作　　者：张鸣[1] 周磊[1] 陈令坤[1] 叶坤[1] ZHANG Ming ZHOU Lei CHEN Lingkun YE Kun(College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127

出　　处：《四川建筑科学研究》2016年第5期62-67,共6页Sichuan Building Science

基　　金：住房和城乡建设部科学技术计划项目(2013-K5-31);江苏省第十批"六大人才高峰"高层次人才选拔培养项目(JZ-005);中国博士后科学基金(2013M530022)

摘　　要：运用SAP 2000有限元分析软件,采用非线性时程分析法对水平和竖向地震耦合作用下的框架进行了动力分析。探讨了铅芯橡胶支座(LRB)用于基础隔震体系时参数的优选问题,同时也对在近断层地震作用下基础隔震结构和未隔震结构动力响应进行了分析和对比。计算结果表明:对于低频地震波而言,随着隔震周期的增大,梁端最大层间位移越小,隔震效果越好;对于高频地震波而言,梁端最大层间位移和节点最大加速度随着隔震周期的增大呈上升趋势。框架层间位移随着屈服刚度比的增大总体呈下降趋势,结构的地震响应降低,并且屈服刚度比对框架结构梁端最大层间位移的影响大于隔震周期对其的影响。节点最大加速度随着屈服刚度比变化的规律,在不同地震波的作用下会有差异,不同之处往往在结构的中部以上。With the finite element analysis software SAP 2000,this paper used non-linear time-history analysis method for dynamic response analysis of frame structure under horizontal and vertical earthquake action of the seismic coupling. Study of lead rubber bearing（ LRB） was used for optimization of parameters of base isolation system,which was analyzed and compared in the near fault earthquake isolation structure and the response of base isolated structure. The calculation results show that,for low frequency seismic waves,with the increase of the beam end isolation period,the maximum inter story displacement is smaller,the better the effect of vibration isolation. For the high frequency of seismic wave,the maximum inter story displacement of beam end and the node with the maximum acceleration increase isolation period. The framework of inter story displacement with the yield stiffness increases overall downward trend,reduces structural seismic response,impact and yield stiffness ratio of beam end is greater than the maximum inter story displacement of the isolation period. With the acceleration of the point of maximum yield stiffness ratio changes,in different seismic waves under the effect of the changes will be different,the difference is often in the above structure in central.

关 键 词：框架结构 非线性时程分析 铅芯橡胶支座 滞回曲线 

分 类 号：TU312[建筑科学—结构工程]